builtin-script.c

	OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
		    "When printing symbols do not display call chain"),
	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
		    "Look for files with symbols relative to this directory"),
	OPT_CALLBACK('f', "fields", NULL, "str",
		     "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso",
		     parse_output_fields),

	OPT_END()
};

static bool have_cmd(int argc, const char **argv)
{
	char **__argv = malloc(sizeof(const char *) * argc);

	if (!__argv)
		die("malloc");
	memcpy(__argv, argv, sizeof(const char *) * argc);
	argc = parse_options(argc, (const char **)__argv, record_options,
			     NULL, PARSE_OPT_STOP_AT_NON_OPTION);
	free(__argv);

	return argc != 0;
}

int cmd_script(int argc, const char **argv, const char *prefix __used)
{
	char *rec_script_path = NULL;
	char *rep_script_path = NULL;
	struct perf_session *session;
	char *script_path = NULL;
	const char **__argv;
	bool system_wide;
	int i, j, err;

	setup_scripting();

	argc = parse_options(argc, argv, options, script_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);

	if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
		rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
		if (!rec_script_path)
			return cmd_record(argc, argv, NULL);
	}

	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
		if (!rep_script_path) {
			fprintf(stderr,
				"Please specify a valid report script"
				"(see 'perf script -l' for listing)\n");
			return -1;
		}
	}

	/* make sure PERF_EXEC_PATH is set for scripts */
	perf_set_argv_exec_path(perf_exec_path());

	if (argc && !script_name && !rec_script_path && !rep_script_path) {
		int live_pipe[2];
		int rep_args;
		pid_t pid;

		rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
		rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);

		if (!rec_script_path && !rep_script_path) {
			fprintf(stderr, " Couldn't find script %s\n\n See perf"
				" script -l for available scripts.\n", argv[0]);
			usage_with_options(script_usage, options);
		}

		if (is_top_script(argv[0])) {
			rep_args = argc - 1;
		} else {
			int rec_args;

			rep_args = has_required_arg(rep_script_path);
			rec_args = (argc - 1) - rep_args;
			if (rec_args < 0) {
				fprintf(stderr, " %s script requires options."
					"\n\n See perf script -l for available "
					"scripts and options.\n", argv[0]);
				usage_with_options(script_usage, options);
			}
		}

		if (pipe(live_pipe) < 0) {
			perror("failed to create pipe");
			exit(-1);
		}

		pid = fork();
		if (pid < 0) {
			perror("failed to fork");
			exit(-1);
		}

		if (!pid) {
			system_wide = true;
			j = 0;

			dup2(live_pipe[1], 1);
			close(live_pipe[0]);

			if (!is_top_script(argv[0]))
				system_wide = !have_cmd(argc - rep_args,
							&argv[rep_args]);

			__argv = malloc((argc + 6) * sizeof(const char *));
			if (!__argv)
				die("malloc");

			__argv[j++] = "/bin/sh";
			__argv[j++] = rec_script_path;
			if (system_wide)
				__argv[j++] = "-a";
			__argv[j++] = "-q";
			__argv[j++] = "-o";
			__argv[j++] = "-";
			for (i = rep_args + 1; i < argc; i++)
				__argv[j++] = argv[i];
			__argv[j++] = NULL;

			execvp("/bin/sh", (char **)__argv);
			free(__argv);
			exit(-1);
		}

		dup2(live_pipe[0], 0);
		close(live_pipe[1]);

		__argv = malloc((argc + 4) * sizeof(const char *));
		if (!__argv)
			die("malloc");
		j = 0;
		__argv[j++] = "/bin/sh";
		__argv[j++] = rep_script_path;
		for (i = 1; i < rep_args + 1; i++)
			__argv[j++] = argv[i];
		__argv[j++] = "-i";
		__argv[j++] = "-";
		__argv[j++] = NULL;

		execvp("/bin/sh", (char **)__argv);
		free(__argv);
		exit(-1);
	}

	if (rec_script_path)
		script_path = rec_script_path;
	if (rep_script_path)
		script_path = rep_script_path;

	if (script_path) {
		system_wide = false;
		j = 0;

		if (rec_script_path)
			system_wide = !have_cmd(argc - 1, &argv[1]);

		__argv = malloc((argc + 2) * sizeof(const char *));
		if (!__argv)
			die("malloc");
		__argv[j++] = "/bin/sh";
		__argv[j++] = script_path;
		if (system_wide)
			__argv[j++] = "-a";
		for (i = 2; i < argc; i++)
			__argv[j++] = argv[i];
		__argv[j++] = NULL;

		execvp("/bin/sh", (char **)__argv);
		free(__argv);
		exit(-1);
	}

	if (symbol__init() < 0)
		return -1;
	if (!script_name)
		setup_pager();

	session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
	if (session == NULL)
		return -ENOMEM;

	if (!no_callchain)
		symbol_conf.use_callchain = true;
	else
		symbol_conf.use_callchain = false;

	if (generate_script_lang) {
		struct stat perf_stat;
		int input;

		if (output_set_by_user()) {
			fprintf(stderr,
				"custom fields not supported for generated scripts");
			return -1;
		}

		input = open(input_name, O_RDONLY);
		if (input < 0) {
			perror("failed to open file");
			exit(-1);
		}

		err = fstat(input, &perf_stat);
		if (err < 0) {
			perror("failed to stat file");
			exit(-1);
		}

		if (!perf_stat.st_size) {
			fprintf(stderr, "zero-sized file, nothing to do!\n");
			exit(0);
		}

		scripting_ops = script_spec__lookup(generate_script_lang);
		if (!scripting_ops) {
			fprintf(stderr, "invalid language specifier");
			return -1;
		}

		err = scripting_ops->generate_script("perf-script");
		goto out;
	}

	if (script_name) {
		err = scripting_ops->start_script(script_name, argc, argv);
		if (err)
			goto out;
		pr_debug("perf script started with script %s\n\n", script_name);
	}


	err = perf_session__check_output_opt(session);
	if (err < 0)
		goto out;

	err = __cmd_script(session);

	perf_session__delete(session);
	cleanup_scripting();
out:
	return err;
}